Overwintering guide
How to overwinter giant rainbow plant
Winter watering
Water only occasionally — enough that the rootball never dries out completely, no more. No feeding until spring growth begins.
The mistake that kills giant rainbow plant in winter
Bringing giant rainbow plant into a warm living room. Too much winter warmth forces weak, pale growth that collapses when it goes back outside — cool and bright beats warm and dim.
More giant rainbow plant care
Overwintering giant rainbow plant — FAQ
Does giant rainbow plant need to come indoors for winter?
Giant Rainbow Plant is hardy to roughly USDA zone 9 — winter lows around -7°C. That means it takes cool conditions but not a real freeze. Giant Rainbow Plant will take cool conditions but not a hard freeze, so the aim is a frost-free winter rather than a warm one. An unheated greenhouse, porch, conservatory or bright garage all work well. Keep it cool, bright and on the dry side, and it will hold steady until growth restarts in spring.
When should I move giant rainbow plant for winter?
Move under cover before the first hard frost; back outside after the last spring frost.
How often should I water giant rainbow plant in winter?
Water only occasionally — enough that the rootball never dries out completely, no more. No feeding until spring growth begins.
What kills giant rainbow plant over winter?
Bringing giant rainbow plant into a warm living room. Too much winter warmth forces weak, pale growth that collapses when it goes back outside — cool and bright beats warm and dim.